1. Expression：jump ship
Explanation：To suddenly abandon one's post on a ship, as of a sailor.（弃船潜逃）
Example：No one has been able to find that missing sailor so they think he probably jumped ship.
One of the deckhands jumped ship at the last port.
2. Expression: run a tight ship
Explanation：To keep a place, group, or organization very well-organized and operating efficiently. （要求严格，纪律严明）
Example：I like to run a tight ship around here. That means that you'd better be here at 8:30 and you don't get off work until 5:30. No coming late or going home early! And you don't take more than 30 minutes for lunch. Do you understand?
我喜欢在这里实行严格的纪律,这就是说,你们最好8:30 就到这里,5:30 以前不能下班。迟到早退是不行的。午饭时间不能超过半个小时，明白了吗？
I'm trying very hard to run a tight ship here, but that guy who was hired two months ago has been late almost every morning and one day took more than two hours for lunch. He has left me with no choice but to fire him.
Jane sure ran a tight ship around here. The department has devolved into chaos without her leadership.
Shaona was running a tight ship and didn't waste time on small talk.
Andy is totally organized and totally confident. He runs a tight ship and he does a great job.